1 Department of Medicine, College of Medicine and Allied Health Sciences, University of Sierra Leone, Freetown, Sierra Leone; Connaught Hospital, University of Sierra Leone Teaching Hospitals Complex, Ministry of Health and Sanitation, Freetown, Sierra Leone. Electronic address: lakoh2009@gmail.com.
2 Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH, USA; Division of Infectious Diseases and HIV Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.